Inside the Nerve Center of the US-Led Campaign Against ISIS

— -- The United States-led campaign against ISIS, dubbed "Operation Inherent Resolve," is made up of 60 countries participating militarily, diplomatically and financially to defeat the terror group.

Since last August, the U.S. has conducted more than 3,400 airstrikes in Iraq and Syria at a cost of more than $2.5 billion.

ABC News was recently granted exclusive access to the command center at the heart of the campaign. Watch the digital original video above for an inside look.